Improvement in saw-clamps



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THE GRAPHIC CO. PHOTO *LITHBSSA 4| PARK PLACLNJ'.

UNITED' STATES PATENT QFFICE..

s YLVESTER P. BABCOGK, OF ADRIAN, MICHIGAN.

IMPROVEMENT IN SAW-CLAMPS.

Specification formingpart of Letters Patent No. 158,454, dated January5, 1875 application led July 25, 1874.

To all whom it may concern:

Be it known that I, SYLvEsTER P. BAJ3' COCK, of the city of' Adrian,State of Michigan, have invented a Saw-Clamp, of which the following isa specification:

The object of my invention is to make a light, cheap, and effectivesaw-clamp by the combination of a wood back with the several metalparts, the jaws of which have projections placed in such a manner as tohold against both sides of the saw-blade simultaneously, yet notopposite to each other, thereby allowing the jaws to be made light, andto hold effectively either a thick or thin saw while tiling it.

In the accompanying drawing, Figure l is a perspective view, showin gthe clamp as holding a saw. Fig. 2 is a view of one jaw at tached to theWoodbaok. Fig. 3 shows the front jaw, with the projection and the twocups. Fig. 4 is a view of the straining-iron, with hooks on each end anda square hole, beveled, so as to admit and hold a squareheaded bolt.Fig. 5 is the eccentric lever 5 Iig. 6, the spring. j

The back jaw, A, is attached to one end of a board five or six incheswide, and about sixteen inches long, by means of two screws, as shown onthe parts extended down in Fig. 2. The parts o o, Fig. 2, are extendeddown from the body of the jaw and rest on the tace of the board D. Thejaw A abuts back, (about midway up,) so as to rest Afirmly on upper edgeof the board. Just over the two screw-holes c e are projections t' z',cast out flush withthe face of the jaw, and reaching down about an inchbelow said face. These projections are about four inches apart. Thefront jaw, B, is fastened to the board D by means of two screws, asshown at ff. About three inches above the screw-holes ff are cups g g,cast in the inside of the jaw B, to admit rubber or spiral springs, saidsprings C G' resting between the jaw and the board D, and being held inplace by the cups in the jaw B. The springs C C open the jaw B when theeccentric lever H is turned up. The lever H is placed under the hookedupper end of the straining-iron K, between it and the jaw B. At thecent-er, on the inside of thc jaw B, I make a projection, j, simi lar tot' on the jaw A, about the saine distance from the top, and out liushwith the face ot' the jaw. One end of the straining-iron K is insertedunderneath the lower end ot' the jaw B, and the other end rests over theoutside of said jaw at the point where the lever H is applied, and it isstrained to the board D by means of a bolt, S, passing through thestraining-iron about three inches from its lo wer end, and also throughthe board D. The bolt S serves to tighten or loosen the jaw B, andadapts it to the various thicknesses ot' metal desired to be held,simply by turning the nut on the back side ot' the board one way or theother.

In using the clamp it is trst necessary to secure it in position, thenturn the nut just sutciently to admit the saw between the jaws, andafter the saw is inserted the eccentric lever H is pressed firmly down,which forces the jaw B toward the jaw A. Theproiections t i strike thesaw on one side about four inches apart, while the projection j strikesit on the other side about midway between the two, so that theircombined action does not force the jaws apart, yet et't'ectually keepsthe saw-blade from vibrating, and enables the operator to tile fasterand better than without such support.

I claim as my inventionl. The combination ofthe jaws A B, the formerhaving the projections t' t', and the latter the projection j,constructed and arranged as and for the purpose set forth.

2. The combination, with the jaw B, having the springs c c and the boardD, of the lever H, straining-iron K, and bolt S, for adjusting the jawB, as and for the purpose set forth. SYLVESTEB P. BABGOCK. Witnesses:

C. B. J oHNsoN, O. F. GREGORY.

